Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
9607fc9c |
3 | * Copyright (c) 1991-1997, Larry Wall |
79072805 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
13 | * you. What more do you want to know?' |
14 | * 'The names of all the stars, and of all living things, and the whole |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
16 | * laughed Pippin. |
79072805 |
17 | */ |
18 | |
19 | #include "EXTERN.h" |
20 | #include "perl.h" |
21 | |
71be2cbc |
22 | EXT char rcsid[]; |
93a17b20 |
23 | |
79072805 |
24 | GV * |
8ac85365 |
25 | gv_AVadd(register GV *gv) |
79072805 |
26 | { |
a0d0e21e |
27 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
28 | croak("Bad symbol for array"); |
79072805 |
29 | if (!GvAV(gv)) |
30 | GvAV(gv) = newAV(); |
31 | return gv; |
32 | } |
33 | |
34 | GV * |
8ac85365 |
35 | gv_HVadd(register GV *gv) |
79072805 |
36 | { |
a0d0e21e |
37 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
38 | croak("Bad symbol for hash"); |
79072805 |
39 | if (!GvHV(gv)) |
463ee0b2 |
40 | GvHV(gv) = newHV(); |
79072805 |
41 | return gv; |
42 | } |
43 | |
44 | GV * |
8ac85365 |
45 | gv_IOadd(register GV *gv) |
a0d0e21e |
46 | { |
47 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
48 | croak("Bad symbol for filehandle"); |
49 | if (!GvIOp(gv)) |
50 | GvIOp(gv) = newIO(); |
51 | return gv; |
52 | } |
53 | |
54 | GV * |
8ac85365 |
55 | gv_fetchfile(char *name) |
79072805 |
56 | { |
e858de61 |
57 | dTHR; |
53d95988 |
58 | char smallbuf[256]; |
59 | char *tmpbuf; |
8ebc5c01 |
60 | STRLEN tmplen; |
79072805 |
61 | GV *gv; |
62 | |
53d95988 |
63 | tmplen = strlen(name) + 2; |
64 | if (tmplen < sizeof smallbuf) |
65 | tmpbuf = smallbuf; |
66 | else |
67 | New(603, tmpbuf, tmplen + 1, char); |
68 | tmpbuf[0] = '_'; |
69 | tmpbuf[1] = '<'; |
70 | strcpy(tmpbuf + 2, name); |
3280af22 |
71 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
8ebc5c01 |
72 | if (!isGV(gv)) |
3280af22 |
73 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
53d95988 |
74 | if (tmpbuf != smallbuf) |
75 | Safefree(tmpbuf); |
79072805 |
76 | sv_setpv(GvSV(gv), name); |
8ebc5c01 |
77 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 |
78 | GvMULTI_on(gv); |
84902520 |
79 | if (PERLDB_LINE) |
93a17b20 |
80 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 |
81 | return gv; |
82 | } |
83 | |
463ee0b2 |
84 | void |
8ac85365 |
85 | gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi) |
463ee0b2 |
86 | { |
0f15f207 |
87 | dTHR; |
463ee0b2 |
88 | register GP *gp; |
55d729e4 |
89 | bool doproto = SvTYPE(gv) > SVt_NULL; |
90 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
91 | |
dc437b57 |
92 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
93 | if (SvLEN(gv)) { |
94 | if (proto) { |
95 | SvPVX(gv) = NULL; |
96 | SvLEN(gv) = 0; |
97 | SvPOK_off(gv); |
98 | } else |
99 | Safefree(SvPVX(gv)); |
100 | } |
44a8e56a |
101 | Newz(602, gp, 1, GP); |
8990e307 |
102 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
103 | GvSV(gv) = NEWSV(72,0); |
3280af22 |
104 | GvLINE(gv) = PL_curcop->cop_line; |
105 | GvFILEGV(gv) = PL_curcop->cop_filegv; |
005a453c |
106 | GvCVGEN(gv) = 0; |
463ee0b2 |
107 | GvEGV(gv) = gv; |
108 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
85aff577 |
109 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
110 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
111 | GvNAMELEN(gv) = len; |
112 | if (multi) |
a5f75d66 |
113 | GvMULTI_on(gv); |
55d729e4 |
114 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
115 | SvIOK_off(gv); |
55d729e4 |
116 | ENTER; |
117 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
118 | GvCV(gv) = PL_compcv; |
55d729e4 |
119 | LEAVE; |
120 | |
3280af22 |
121 | PL_sub_generation++; |
55d729e4 |
122 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
3280af22 |
123 | CvFILEGV(GvCV(gv)) = PL_curcop->cop_filegv; |
124 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
125 | #ifdef USE_THREADS |
126 | CvOWNER(GvCV(gv)) = 0; |
b0a484d2 |
127 | if (!CvMUTEXP(GvCV(gv))) |
128 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
55d729e4 |
129 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
130 | #endif /* USE_THREADS */ |
131 | if (proto) { |
132 | sv_setpv((SV*)GvCV(gv), proto); |
133 | Safefree(proto); |
134 | } |
135 | } |
463ee0b2 |
136 | } |
137 | |
76e3520e |
138 | STATIC void |
8ac85365 |
139 | gv_init_sv(GV *gv, I32 sv_type) |
a0d0e21e |
140 | { |
141 | switch (sv_type) { |
142 | case SVt_PVIO: |
143 | (void)GvIOn(gv); |
144 | break; |
145 | case SVt_PVAV: |
146 | (void)GvAVn(gv); |
147 | break; |
148 | case SVt_PVHV: |
149 | (void)GvHVn(gv); |
150 | break; |
151 | } |
152 | } |
153 | |
79072805 |
154 | GV * |
8ac85365 |
155 | gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level) |
79072805 |
156 | { |
157 | AV* av; |
463ee0b2 |
158 | GV* topgv; |
79072805 |
159 | GV* gv; |
463ee0b2 |
160 | GV** gvp; |
748a9306 |
161 | CV* cv; |
a0d0e21e |
162 | |
163 | if (!stash) |
164 | return 0; |
44a8e56a |
165 | if ((level > 100) || (level < -100)) |
3e0ccd42 |
166 | croak("Recursive inheritance detected while looking for method '%s' in package '%s'", |
167 | name, HvNAME(stash)); |
463ee0b2 |
168 | |
463ee0b2 |
169 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
170 | |
171 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
172 | if (!gvp) |
173 | topgv = Nullgv; |
174 | else { |
175 | topgv = *gvp; |
176 | if (SvTYPE(topgv) != SVt_PVGV) |
177 | gv_init(topgv, stash, name, len, TRUE); |
178 | if (cv = GvCV(topgv)) { |
179 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
180 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
181 | return topgv; |
44a8e56a |
182 | /* Stale cached entry: junk it */ |
183 | SvREFCNT_dec(cv); |
184 | GvCV(topgv) = cv = Nullcv; |
185 | GvCVGEN(topgv) = 0; |
748a9306 |
186 | } |
3280af22 |
187 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
188 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
189 | } |
79072805 |
190 | |
9607fc9c |
191 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
192 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
193 | |
fb73857a |
194 | /* create and re-create @.*::SUPER::ISA on demand */ |
195 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
196 | char* packname = HvNAME(stash); |
197 | STRLEN packlen = strlen(packname); |
198 | |
199 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
200 | HV* basestash; |
201 | |
202 | packlen -= 7; |
203 | basestash = gv_stashpvn(packname, packlen, TRUE); |
204 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
205 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
e858de61 |
206 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c |
207 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
208 | if (!gvp || !(gv = *gvp)) |
209 | croak("Cannot create %s::ISA", HvNAME(stash)); |
210 | if (SvTYPE(gv) != SVt_PVGV) |
211 | gv_init(gv, stash, "ISA", 3, TRUE); |
212 | SvREFCNT_dec(GvAV(gv)); |
213 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
214 | } |
215 | } |
216 | } |
217 | |
218 | if (av) { |
79072805 |
219 | SV** svp = AvARRAY(av); |
93965878 |
220 | /* NOTE: No support for tied ISA */ |
221 | I32 items = AvFILLp(av) + 1; |
79072805 |
222 | while (items--) { |
79072805 |
223 | SV* sv = *svp++; |
a0d0e21e |
224 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
225 | if (!basestash) { |
3280af22 |
226 | if (PL_dowarn) |
a0d0e21e |
227 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
228 | SvPVX(sv), HvNAME(stash)); |
79072805 |
229 | continue; |
230 | } |
44a8e56a |
231 | gv = gv_fetchmeth(basestash, name, len, |
232 | (level >= 0) ? level + 1 : level - 1); |
233 | if (gv) |
234 | goto gotcha; |
79072805 |
235 | } |
236 | } |
a0d0e21e |
237 | |
9607fc9c |
238 | /* if at top level, try UNIVERSAL */ |
239 | |
44a8e56a |
240 | if (level == 0 || level == -1) { |
9607fc9c |
241 | HV* lastchance; |
242 | |
dc437b57 |
243 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
244 | if (gv = gv_fetchmeth(lastchance, name, len, |
245 | (level >= 0) ? level + 1 : level - 1)) { |
246 | gotcha: |
dc848c6f |
247 | /* |
248 | * Cache method in topgv if: |
249 | * 1. topgv has no synonyms (else inheritance crosses wires) |
250 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
251 | */ |
252 | if (topgv && |
253 | GvREFCNT(topgv) == 1 && |
254 | (cv = GvCV(gv)) && |
255 | (CvROOT(cv) || CvXSUB(cv))) |
256 | { |
44a8e56a |
257 | if (cv = GvCV(topgv)) |
258 | SvREFCNT_dec(cv); |
259 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
260 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
261 | } |
a0d0e21e |
262 | return gv; |
263 | } |
005a453c |
264 | else if (topgv && GvREFCNT(topgv) == 1) { |
265 | /* cache the fact that the method is not defined */ |
3280af22 |
266 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
267 | } |
a0d0e21e |
268 | } |
269 | } |
270 | |
79072805 |
271 | return 0; |
272 | } |
273 | |
274 | GV * |
8ac85365 |
275 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 |
276 | { |
dc848c6f |
277 | return gv_fetchmethod_autoload(stash, name, TRUE); |
278 | } |
279 | |
280 | GV * |
8ac85365 |
281 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f |
282 | { |
0f15f207 |
283 | dTHR; |
463ee0b2 |
284 | register char *nend; |
a0d0e21e |
285 | char *nsplit = 0; |
286 | GV* gv; |
463ee0b2 |
287 | |
288 | for (nend = name; *nend; nend++) { |
9607fc9c |
289 | if (*nend == '\'') |
a0d0e21e |
290 | nsplit = nend; |
9607fc9c |
291 | else if (*nend == ':' && *(nend + 1) == ':') |
292 | nsplit = ++nend; |
a0d0e21e |
293 | } |
294 | if (nsplit) { |
a0d0e21e |
295 | char *origname = name; |
296 | name = nsplit + 1; |
a0d0e21e |
297 | if (*nsplit == ':') |
298 | --nsplit; |
9607fc9c |
299 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
300 | /* ->SUPER::method should really be looked up in original stash */ |
fc36a67e |
301 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
3280af22 |
302 | HvNAME(PL_curcop->cop_stash))); |
9607fc9c |
303 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
304 | DEBUG_o( deb("Treating %s as %s::%s\n", |
305 | origname, HvNAME(stash), name) ); |
4633a7c4 |
306 | } |
9607fc9c |
307 | else |
308 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
309 | } |
310 | |
9607fc9c |
311 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
312 | if (!gv) { |
702887b4 |
313 | if (strEQ(name,"import")) |
3280af22 |
314 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
315 | else if (autoload) |
54310121 |
316 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
317 | } |
dc848c6f |
318 | else if (autoload) { |
319 | CV* cv = GvCV(gv); |
09280a33 |
320 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
321 | GV* stubgv; |
322 | GV* autogv; |
323 | |
324 | if (CvANON(cv)) |
325 | stubgv = gv; |
326 | else { |
327 | stubgv = CvGV(cv); |
328 | if (GvCV(stubgv) != cv) /* orphaned import */ |
329 | stubgv = gv; |
330 | } |
331 | autogv = gv_autoload4(GvSTASH(stubgv), |
332 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
333 | if (autogv) |
334 | gv = autogv; |
335 | } |
336 | } |
44a8e56a |
337 | |
338 | return gv; |
339 | } |
340 | |
341 | GV* |
8ac85365 |
342 | gv_autoload4(HV *stash, char *name, STRLEN len, I32 method) |
44a8e56a |
343 | { |
344 | static char autoload[] = "AUTOLOAD"; |
345 | static STRLEN autolen = 8; |
346 | GV* gv; |
347 | CV* cv; |
348 | HV* varstash; |
349 | GV* vargv; |
350 | SV* varsv; |
351 | |
352 | if (len == autolen && strnEQ(name, autoload, autolen)) |
353 | return Nullgv; |
dc848c6f |
354 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
355 | return Nullgv; |
356 | cv = GvCV(gv); |
357 | |
358 | /* |
359 | * Inheriting AUTOLOAD for non-methods works ... for now. |
360 | */ |
3280af22 |
361 | if (PL_dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
dc848c6f |
362 | warn( |
363 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
364 | HvNAME(stash), (int)len, name); |
44a8e56a |
365 | |
366 | /* |
367 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
368 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
369 | * use that, but for lack of anything better we will use the sub's |
370 | * original package to look up $AUTOLOAD. |
371 | */ |
372 | varstash = GvSTASH(CvGV(cv)); |
373 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
374 | if (!isGV(vargv)) |
375 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
376 | varsv = GvSV(vargv); |
377 | sv_setpv(varsv, HvNAME(stash)); |
378 | sv_catpvn(varsv, "::", 2); |
379 | sv_catpvn(varsv, name, len); |
380 | SvTAINTED_off(varsv); |
a0d0e21e |
381 | return gv; |
382 | } |
383 | |
384 | HV* |
8ac85365 |
385 | gv_stashpv(char *name, I32 create) |
a0d0e21e |
386 | { |
dc437b57 |
387 | return gv_stashpvn(name, strlen(name), create); |
388 | } |
389 | |
390 | HV* |
8ac85365 |
391 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 |
392 | { |
46fc3d4c |
393 | char smallbuf[256]; |
394 | char *tmpbuf; |
a0d0e21e |
395 | HV *stash; |
396 | GV *tmpgv; |
dc437b57 |
397 | |
46fc3d4c |
398 | if (namelen + 3 < sizeof smallbuf) |
399 | tmpbuf = smallbuf; |
400 | else |
401 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
402 | Copy(name,tmpbuf,namelen,char); |
403 | tmpbuf[namelen++] = ':'; |
404 | tmpbuf[namelen++] = ':'; |
405 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
406 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
407 | if (tmpbuf != smallbuf) |
408 | Safefree(tmpbuf); |
a0d0e21e |
409 | if (!tmpgv) |
410 | return 0; |
411 | if (!GvHV(tmpgv)) |
412 | GvHV(tmpgv) = newHV(); |
413 | stash = GvHV(tmpgv); |
414 | if (!HvNAME(stash)) |
415 | HvNAME(stash) = savepv(name); |
416 | return stash; |
463ee0b2 |
417 | } |
418 | |
a0d0e21e |
419 | HV* |
8ac85365 |
420 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e |
421 | { |
dc437b57 |
422 | register char *ptr; |
423 | STRLEN len; |
424 | ptr = SvPV(sv,len); |
425 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
426 | } |
427 | |
428 | |
463ee0b2 |
429 | GV * |
8ac85365 |
430 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 |
431 | { |
11343788 |
432 | dTHR; |
463ee0b2 |
433 | register char *name = nambeg; |
434 | register GV *gv = 0; |
79072805 |
435 | GV**gvp; |
79072805 |
436 | I32 len; |
437 | register char *namend; |
463ee0b2 |
438 | HV *stash = 0; |
9607fc9c |
439 | U32 add_gvflags = 0; |
79072805 |
440 | |
c07a80fd |
441 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
442 | name++; |
443 | |
79072805 |
444 | for (namend = name; *namend; namend++) { |
463ee0b2 |
445 | if ((*namend == '\'' && namend[1]) || |
446 | (*namend == ':' && namend[1] == ':')) |
447 | { |
463ee0b2 |
448 | if (!stash) |
3280af22 |
449 | stash = PL_defstash; |
dc437b57 |
450 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
451 | return Nullgv; |
463ee0b2 |
452 | |
85e6fe83 |
453 | len = namend - name; |
454 | if (len > 0) { |
3c78fafa |
455 | char smallbuf[256]; |
62b57502 |
456 | char *tmpbuf; |
62b57502 |
457 | |
3c78fafa |
458 | if (len + 3 < sizeof smallbuf) |
459 | tmpbuf = smallbuf; |
62b57502 |
460 | else |
461 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
462 | Copy(name, tmpbuf, len, char); |
463 | tmpbuf[len++] = ':'; |
464 | tmpbuf[len++] = ':'; |
465 | tmpbuf[len] = '\0'; |
463ee0b2 |
466 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
467 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
468 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
469 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
470 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
471 | else |
472 | GvMULTI_on(gv); |
473 | } |
3c78fafa |
474 | if (tmpbuf != smallbuf) |
62b57502 |
475 | Safefree(tmpbuf); |
3280af22 |
476 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
477 | return Nullgv; |
85e6fe83 |
478 | |
463ee0b2 |
479 | if (!(stash = GvHV(gv))) |
480 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
481 | |
463ee0b2 |
482 | if (!HvNAME(stash)) |
a0d0e21e |
483 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
484 | } |
485 | |
486 | if (*namend == ':') |
487 | namend++; |
488 | namend++; |
489 | name = namend; |
490 | if (!*name) |
3280af22 |
491 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
492 | } |
79072805 |
493 | } |
a0d0e21e |
494 | len = namend - name; |
495 | if (!len) |
496 | len = 1; |
463ee0b2 |
497 | |
498 | /* No stash in name, so see how we can default */ |
499 | |
500 | if (!stash) { |
501 | if (isIDFIRST(*name)) { |
9607fc9c |
502 | bool global = FALSE; |
503 | |
463ee0b2 |
504 | if (isUPPER(*name)) { |
505 | if (*name > 'I') { |
506 | if (*name == 'S' && ( |
507 | strEQ(name, "SIG") || |
508 | strEQ(name, "STDIN") || |
509 | strEQ(name, "STDOUT") || |
510 | strEQ(name, "STDERR") )) |
511 | global = TRUE; |
512 | } |
513 | else if (*name > 'E') { |
514 | if (*name == 'I' && strEQ(name, "INC")) |
515 | global = TRUE; |
516 | } |
517 | else if (*name > 'A') { |
518 | if (*name == 'E' && strEQ(name, "ENV")) |
519 | global = TRUE; |
520 | } |
521 | else if (*name == 'A' && ( |
522 | strEQ(name, "ARGV") || |
523 | strEQ(name, "ARGVOUT") )) |
524 | global = TRUE; |
525 | } |
526 | else if (*name == '_' && !name[1]) |
527 | global = TRUE; |
9607fc9c |
528 | |
463ee0b2 |
529 | if (global) |
3280af22 |
530 | stash = PL_defstash; |
531 | else if ((COP*)PL_curcop == &PL_compiling) { |
532 | stash = PL_curstash; |
533 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
534 | sv_type != SVt_PVCV && |
535 | sv_type != SVt_PVGV && |
4633a7c4 |
536 | sv_type != SVt_PVFM && |
c07a80fd |
537 | sv_type != SVt_PVIO && |
377b8fbc |
538 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
539 | { |
4633a7c4 |
540 | gvp = (GV**)hv_fetch(stash,name,len,0); |
541 | if (!gvp || |
3280af22 |
542 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
543 | SvTYPE(*gvp) != SVt_PVGV) |
544 | { |
4633a7c4 |
545 | stash = 0; |
a5f75d66 |
546 | } |
547 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
548 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
549 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
550 | { |
a5f75d66 |
551 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
552 | sv_type == SVt_PVAV ? '@' : |
553 | sv_type == SVt_PVHV ? '%' : '$', |
554 | name); |
8ebc5c01 |
555 | if (GvCVu(*gvp)) |
4633a7c4 |
556 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
557 | stash = 0; |
4633a7c4 |
558 | } |
a0d0e21e |
559 | } |
85e6fe83 |
560 | } |
463ee0b2 |
561 | else |
3280af22 |
562 | stash = PL_curcop->cop_stash; |
463ee0b2 |
563 | } |
564 | else |
3280af22 |
565 | stash = PL_defstash; |
463ee0b2 |
566 | } |
567 | |
568 | /* By this point we should have a stash and a name */ |
569 | |
a0d0e21e |
570 | if (!stash) { |
93233ece |
571 | if (!add) |
a0d0e21e |
572 | return Nullgv; |
0f303493 |
573 | if (add & ~GV_ADDMULTI) { |
2c4aebbd |
574 | char sv_type_char = ((sv_type == SVt_PV) ? '$' |
575 | : (sv_type == SVt_PVAV) ? '@' |
576 | : (sv_type == SVt_PVHV) ? '%' |
577 | : 0); |
578 | if (sv_type_char) |
579 | warn("Global symbol \"%c%s\" requires explicit package name", |
580 | sv_type_char, name); |
581 | else |
93233ece |
582 | warn("Global symbol \"%s\" requires explicit package name", |
583 | name); |
a0d0e21e |
584 | } |
3280af22 |
585 | ++PL_error_count; |
586 | stash = PL_curstash ? PL_curstash : PL_defstash; /* avoid core dumps */ |
93233ece |
587 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
588 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
589 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
590 | : 0); |
a0d0e21e |
591 | } |
592 | |
593 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
594 | return Nullgv; |
595 | |
79072805 |
596 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
597 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
598 | return Nullgv; |
599 | gv = *gvp; |
600 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
601 | if (add) { |
a5f75d66 |
602 | GvMULTI_on(gv); |
a0d0e21e |
603 | gv_init_sv(gv, sv_type); |
604 | } |
79072805 |
605 | return gv; |
55d729e4 |
606 | } else if (add & GV_NOINIT) { |
607 | return gv; |
79072805 |
608 | } |
93a17b20 |
609 | |
610 | /* Adding a new symbol */ |
611 | |
55d729e4 |
612 | if (add & GV_ADDWARN) |
a0d0e21e |
613 | warn("Had to create %s unexpectedly", nambeg); |
55d729e4 |
614 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
615 | gv_init_sv(gv, sv_type); |
9607fc9c |
616 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
617 | |
618 | /* set up magic where warranted */ |
619 | switch (*name) { |
a0d0e21e |
620 | case 'A': |
621 | if (strEQ(name, "ARGV")) { |
622 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
623 | } |
624 | break; |
625 | |
ed6116ce |
626 | case 'a': |
627 | case 'b': |
628 | if (len == 1) |
a5f75d66 |
629 | GvMULTI_on(gv); |
ed6116ce |
630 | break; |
a0d0e21e |
631 | case 'E': |
632 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
633 | GvMULTI_on(gv); |
a0d0e21e |
634 | break; |
463ee0b2 |
635 | case 'I': |
636 | if (strEQ(name, "ISA")) { |
637 | AV* av = GvAVn(gv); |
a5f75d66 |
638 | GvMULTI_on(gv); |
a0d0e21e |
639 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
640 | /* NOTE: No support for tied ISA */ |
55d729e4 |
641 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
642 | && AvFILLp(av) == -1) |
85e6fe83 |
643 | { |
a0d0e21e |
644 | char *pname; |
645 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
646 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
647 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
648 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
649 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
650 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
651 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
652 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
653 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
654 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
655 | } |
463ee0b2 |
656 | } |
657 | break; |
a0d0e21e |
658 | #ifdef OVERLOAD |
659 | case 'O': |
660 | if (strEQ(name, "OVERLOAD")) { |
661 | HV* hv = GvHVn(gv); |
a5f75d66 |
662 | GvMULTI_on(gv); |
ea0efc06 |
663 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
664 | } |
665 | break; |
666 | #endif /* OVERLOAD */ |
93a17b20 |
667 | case 'S': |
668 | if (strEQ(name, "SIG")) { |
669 | HV *hv; |
dc437b57 |
670 | I32 i; |
3280af22 |
671 | PL_siggv = gv; |
672 | GvMULTI_on(PL_siggv); |
673 | hv = GvHVn(PL_siggv); |
674 | hv_magic(hv, PL_siggv, 'S'); |
dc437b57 |
675 | for(i=1;sig_name[i];i++) { |
676 | SV ** init; |
677 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
678 | if(init) |
3280af22 |
679 | sv_setsv(*init,&PL_sv_undef); |
dc437b57 |
680 | psig_ptr[i] = 0; |
681 | psig_name[i] = 0; |
682 | } |
93a17b20 |
683 | } |
684 | break; |
685 | |
686 | case '&': |
463ee0b2 |
687 | if (len > 1) |
688 | break; |
3280af22 |
689 | PL_ampergv = gv; |
690 | PL_sawampersand = TRUE; |
a0d0e21e |
691 | goto ro_magicalize; |
93a17b20 |
692 | |
693 | case '`': |
463ee0b2 |
694 | if (len > 1) |
695 | break; |
3280af22 |
696 | PL_leftgv = gv; |
697 | PL_sawampersand = TRUE; |
a0d0e21e |
698 | goto ro_magicalize; |
93a17b20 |
699 | |
700 | case '\'': |
463ee0b2 |
701 | if (len > 1) |
702 | break; |
3280af22 |
703 | PL_rightgv = gv; |
704 | PL_sawampersand = TRUE; |
a0d0e21e |
705 | goto ro_magicalize; |
93a17b20 |
706 | |
707 | case ':': |
463ee0b2 |
708 | if (len > 1) |
709 | break; |
3280af22 |
710 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
711 | goto magicalize; |
712 | |
ff0cee69 |
713 | case '?': |
714 | if (len > 1) |
715 | break; |
716 | #ifdef COMPLEX_STATUS |
717 | sv_upgrade(GvSV(gv), SVt_PVLV); |
718 | #endif |
719 | goto magicalize; |
720 | |
067391ea |
721 | case '!': |
4318d5a0 |
722 | if (len > 1) |
067391ea |
723 | break; |
3280af22 |
724 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
067391ea |
725 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
726 | if(!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
727 | dSP; |
728 | PUTBACK; |
729 | perl_require_pv("Errno.pm"); |
730 | SPAGAIN; |
731 | stash = gv_stashpvn("Errno",5,FALSE); |
732 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
1d2dff63 |
733 | croak("Can't use %%! because Errno.pm is not available"); |
067391ea |
734 | } |
735 | } |
736 | goto magicalize; |
93a17b20 |
737 | case '#': |
a0d0e21e |
738 | case '*': |
3280af22 |
739 | if (PL_dowarn && len == 1 && sv_type == SVt_PV) |
a0d0e21e |
740 | warn("Use of $%s is deprecated", name); |
741 | /* FALL THROUGH */ |
742 | case '[': |
93a17b20 |
743 | case '^': |
744 | case '~': |
745 | case '=': |
746 | case '-': |
747 | case '%': |
748 | case '.': |
93a17b20 |
749 | case '(': |
750 | case ')': |
751 | case '<': |
752 | case '>': |
753 | case ',': |
754 | case '\\': |
755 | case '/': |
93a17b20 |
756 | case '|': |
748a9306 |
757 | case '\001': |
93a17b20 |
758 | case '\004': |
ad8898e0 |
759 | case '\005': |
748a9306 |
760 | case '\006': |
a0d0e21e |
761 | case '\010': |
ad8898e0 |
762 | case '\017': |
93a17b20 |
763 | case '\t': |
764 | case '\020': |
765 | case '\024': |
766 | case '\027': |
463ee0b2 |
767 | if (len > 1) |
768 | break; |
769 | goto magicalize; |
770 | |
a0d0e21e |
771 | case '+': |
463ee0b2 |
772 | case '1': |
773 | case '2': |
774 | case '3': |
775 | case '4': |
776 | case '5': |
777 | case '6': |
778 | case '7': |
779 | case '8': |
780 | case '9': |
fb73857a |
781 | case '\023': |
a0d0e21e |
782 | ro_magicalize: |
783 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
784 | magicalize: |
463ee0b2 |
785 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
786 | break; |
787 | |
788 | case '\014': |
463ee0b2 |
789 | if (len > 1) |
790 | break; |
93a17b20 |
791 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
792 | PL_formfeed = GvSV(gv); |
93a17b20 |
793 | break; |
794 | case ';': |
463ee0b2 |
795 | if (len > 1) |
796 | break; |
93a17b20 |
797 | sv_setpv(GvSV(gv),"\034"); |
798 | break; |
463ee0b2 |
799 | case ']': |
800 | if (len == 1) { |
f86702cc |
801 | SV *sv = GvSV(gv); |
93a17b20 |
802 | sv_upgrade(sv, SVt_PVNV); |
3280af22 |
803 | sv_setpv(sv, PL_patchlevel); |
f86702cc |
804 | (void)sv_2nv(sv); |
805 | SvREADONLY_on(sv); |
93a17b20 |
806 | } |
807 | break; |
79072805 |
808 | } |
93a17b20 |
809 | return gv; |
79072805 |
810 | } |
811 | |
812 | void |
8ac85365 |
813 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
814 | { |
815 | HV *hv = GvSTASH(gv); |
f967eb5f |
816 | if (!hv) { |
817 | SvOK_off(sv); |
79072805 |
818 | return; |
f967eb5f |
819 | } |
820 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
821 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
822 | sv_catpvn(sv,"::", 2); |
79072805 |
823 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
824 | } |
825 | |
826 | void |
8ac85365 |
827 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
828 | { |
f967eb5f |
829 | GV *egv = GvEGV(gv); |
748a9306 |
830 | if (!egv) |
831 | egv = gv; |
f6aff53a |
832 | gv_fullname3(sv, egv, prefix); |
833 | } |
834 | |
835 | /* XXX compatibility with versions <= 5.003. */ |
836 | void |
8ac85365 |
837 | gv_fullname(SV *sv, GV *gv) |
f6aff53a |
838 | { |
839 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
840 | } |
841 | |
842 | /* XXX compatibility with versions <= 5.003. */ |
843 | void |
8ac85365 |
844 | gv_efullname(SV *sv, GV *gv) |
f6aff53a |
845 | { |
846 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
847 | } |
848 | |
849 | IO * |
8ac85365 |
850 | newIO(void) |
79072805 |
851 | { |
11343788 |
852 | dTHR; |
79072805 |
853 | IO *io; |
8990e307 |
854 | GV *iogv; |
855 | |
856 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
857 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
858 | SvREFCNT(io) = 1; |
859 | SvOBJECT_on(io); |
c9de509e |
860 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
861 | if (!iogv) |
862 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
863 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
864 | return io; |
865 | } |
866 | |
867 | void |
8ac85365 |
868 | gv_check(HV *stash) |
79072805 |
869 | { |
11343788 |
870 | dTHR; |
79072805 |
871 | register HE *entry; |
872 | register I32 i; |
873 | register GV *gv; |
463ee0b2 |
874 | HV *hv; |
a0d0e21e |
875 | GV *filegv; |
463ee0b2 |
876 | |
8990e307 |
877 | if (!HvARRAY(stash)) |
878 | return; |
a0d0e21e |
879 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
880 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
881 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
882 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
883 | { |
3280af22 |
884 | if (hv != PL_defstash) |
a0d0e21e |
885 | gv_check(hv); /* nested package */ |
886 | } |
dc437b57 |
887 | else if (isALPHA(*HeKEY(entry))) { |
888 | gv = (GV*)HeVAL(entry); |
55d729e4 |
889 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
890 | continue; |
3280af22 |
891 | PL_curcop->cop_line = GvLINE(gv); |
a0d0e21e |
892 | filegv = GvFILEGV(gv); |
3280af22 |
893 | PL_curcop->cop_filegv = filegv; |
a5f75d66 |
894 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
895 | continue; |
dc437b57 |
896 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
897 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
898 | } |
79072805 |
899 | } |
900 | } |
901 | } |
902 | |
903 | GV * |
8ac85365 |
904 | newGVgen(char *pack) |
79072805 |
905 | { |
3280af22 |
906 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
907 | TRUE, SVt_PVGV); |
79072805 |
908 | } |
909 | |
910 | /* hopefully this is only called on local symbol table entries */ |
911 | |
912 | GP* |
8ac85365 |
913 | gp_ref(GP *gp) |
79072805 |
914 | { |
915 | gp->gp_refcnt++; |
44a8e56a |
916 | if (gp->gp_cv) { |
917 | if (gp->gp_cvgen) { |
918 | /* multi-named GPs cannot be used for method cache */ |
919 | SvREFCNT_dec(gp->gp_cv); |
920 | gp->gp_cv = Nullcv; |
921 | gp->gp_cvgen = 0; |
922 | } |
923 | else { |
924 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
925 | PL_sub_generation++; |
44a8e56a |
926 | } |
927 | } |
79072805 |
928 | return gp; |
79072805 |
929 | } |
930 | |
931 | void |
8ac85365 |
932 | gp_free(GV *gv) |
79072805 |
933 | { |
79072805 |
934 | GP* gp; |
377b8fbc |
935 | CV* cv; |
79072805 |
936 | |
937 | if (!gv || !(gp = GvGP(gv))) |
938 | return; |
939 | if (gp->gp_refcnt == 0) { |
940 | warn("Attempt to free unreferenced glob pointers"); |
941 | return; |
942 | } |
44a8e56a |
943 | if (gp->gp_cv) { |
944 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
945 | PL_sub_generation++; |
44a8e56a |
946 | } |
748a9306 |
947 | if (--gp->gp_refcnt > 0) { |
948 | if (gp->gp_egv == gv) |
949 | gp->gp_egv = 0; |
79072805 |
950 | return; |
748a9306 |
951 | } |
79072805 |
952 | |
8990e307 |
953 | SvREFCNT_dec(gp->gp_sv); |
954 | SvREFCNT_dec(gp->gp_av); |
955 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
956 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
957 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
958 | SvREFCNT_dec(gp->gp_form); |
959 | |
79072805 |
960 | Safefree(gp); |
961 | GvGP(gv) = 0; |
962 | } |
963 | |
964 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
965 | #define MICROPORT |
966 | #endif |
967 | |
968 | #ifdef MICROPORT /* Microport 2.4 hack */ |
969 | AV *GvAVn(gv) |
970 | register GV *gv; |
971 | { |
972 | if (GvGP(gv)->gp_av) |
973 | return GvGP(gv)->gp_av; |
974 | else |
975 | return GvGP(gv_AVadd(gv))->gp_av; |
976 | } |
977 | |
978 | HV *GvHVn(gv) |
979 | register GV *gv; |
980 | { |
981 | if (GvGP(gv)->gp_hv) |
982 | return GvGP(gv)->gp_hv; |
983 | else |
984 | return GvGP(gv_HVadd(gv))->gp_hv; |
985 | } |
986 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
987 | |
988 | #ifdef OVERLOAD |
989 | /* Updates and caches the CV's */ |
990 | |
991 | bool |
8ac85365 |
992 | Gv_AMupdate(HV *stash) |
a0d0e21e |
993 | { |
11343788 |
994 | dTHR; |
a0d0e21e |
995 | GV** gvp; |
996 | HV* hv; |
997 | GV* gv; |
998 | CV* cv; |
999 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
1000 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1001 | AMT amt; |
a0d0e21e |
1002 | |
3280af22 |
1003 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1004 | && amtp->was_ok_sub == PL_sub_generation) |
a6006777 |
1005 | return AMT_AMAGIC(amtp); |
1006 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1007 | int i; |
a6006777 |
1008 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1009 | if (amtp->table[i]) { |
1010 | SvREFCNT_dec(amtp->table[i]); |
1011 | } |
1012 | } |
1013 | } |
a0d0e21e |
1014 | sv_unmagic((SV*)stash, 'c'); |
1015 | |
1016 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
1017 | |
3280af22 |
1018 | amt.was_ok_am = PL_amagic_generation; |
1019 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1020 | amt.fallback = AMGfallNO; |
1021 | amt.flags = 0; |
1022 | |
1023 | #ifdef OVERLOAD_VIA_HASH |
1024 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
3280af22 |
1025 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
a0d0e21e |
1026 | int filled=0; |
1027 | int i; |
1028 | char *cp; |
a0d0e21e |
1029 | SV* sv; |
1030 | SV** svp; |
a0d0e21e |
1031 | |
1032 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1033 | |
a6006777 |
1034 | if (( cp = (char *)AMG_names[0] ) && |
1035 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1036 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1037 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1038 | } |
a6006777 |
1039 | for (i = 1; i < NofAMmeth; i++) { |
1040 | cv = 0; |
1041 | cp = (char *)AMG_names[i]; |
1042 | |
1043 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
3280af22 |
1044 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
a0d0e21e |
1045 | switch (SvTYPE(sv)) { |
1046 | default: |
1047 | if (!SvROK(sv)) { |
1048 | if (!SvOK(sv)) break; |
6b88bc9c |
1049 | gv = gv_fetchmethod(stash, SvPV(sv, PL_na)); |
a0d0e21e |
1050 | if (gv) cv = GvCV(gv); |
1051 | break; |
1052 | } |
1053 | cv = (CV*)SvRV(sv); |
1054 | if (SvTYPE(cv) == SVt_PVCV) |
1055 | break; |
1056 | /* FALL THROUGH */ |
1057 | case SVt_PVHV: |
1058 | case SVt_PVAV: |
a6006777 |
1059 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
1060 | return FALSE; |
1061 | case SVt_PVCV: |
8ebc5c01 |
1062 | cv = (CV*)sv; |
1063 | break; |
a0d0e21e |
1064 | case SVt_PVGV: |
8ebc5c01 |
1065 | if (!(cv = GvCVu((GV*)sv))) |
1066 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1067 | break; |
a0d0e21e |
1068 | } |
1069 | if (cv) filled=1; |
1070 | else { |
a6006777 |
1071 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1072 | cp,HvNAME(stash)); |
1073 | return FALSE; |
1074 | } |
1075 | } |
a6006777 |
1076 | #else |
1077 | { |
1078 | int filled = 0; |
1079 | int i; |
9607fc9c |
1080 | const char *cp; |
a6006777 |
1081 | SV* sv = NULL; |
1082 | SV** svp; |
1083 | |
1084 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1085 | |
9607fc9c |
1086 | if ( cp = AMG_names[0] ) { |
a6006777 |
1087 | /* Try to find via inheritance. */ |
774d564b |
1088 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1089 | if (gv) sv = GvSV(gv); |
1090 | |
774d564b |
1091 | if (!gv) goto no_table; |
a6006777 |
1092 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1093 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1094 | } |
1095 | |
1096 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1097 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1098 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1099 | cp, HvNAME(stash)) ); |
46fc3d4c |
1100 | /* don't fill the cache while looking up! */ |
1101 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1102 | cv = 0; |
44a8e56a |
1103 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1104 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1105 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1106 | /* GvSV contains the name of the method. */ |
1107 | GV *ngv; |
1108 | |
1109 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
3280af22 |
1110 | SvPV(GvSV(gv), PL_na), cp, HvNAME(stash)) ); |
dc848c6f |
1111 | if (!SvPOK(GvSV(gv)) |
1112 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1113 | FALSE))) |
1114 | { |
44a8e56a |
1115 | /* Can be an import stub (created by `can'). */ |
1116 | if (GvCVGEN(gv)) { |
1117 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1118 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1119 | cp, HvNAME(stash)); |
1120 | } else |
1121 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1122 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1123 | cp, HvNAME(stash)); |
1124 | } |
dc848c6f |
1125 | cv = GvCV(gv = ngv); |
44a8e56a |
1126 | } |
1127 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1128 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1129 | GvNAME(CvGV(cv))) ); |
1130 | filled = 1; |
1131 | } |
a6006777 |
1132 | #endif |
1133 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1134 | } |
a0d0e21e |
1135 | if (filled) { |
a6006777 |
1136 | AMT_AMAGIC_on(&amt); |
1137 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1138 | return TRUE; |
1139 | } |
1140 | } |
a6006777 |
1141 | /* Here we have no table: */ |
774d564b |
1142 | no_table: |
a6006777 |
1143 | AMT_AMAGIC_off(&amt); |
1144 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1145 | return FALSE; |
1146 | } |
1147 | |
a0d0e21e |
1148 | SV* |
8ac85365 |
1149 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e |
1150 | { |
11343788 |
1151 | dTHR; |
a0d0e21e |
1152 | MAGIC *mg; |
1153 | CV *cv; |
1154 | CV **cvp=NULL, **ocvp=NULL; |
1155 | AMT *amtp, *oamtp; |
1156 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1157 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1158 | HV* stash; |
1159 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1160 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1161 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1162 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1163 | : (CV **) NULL)) |
748a9306 |
1164 | && ((cv = cvp[off=method+assignshift]) |
1165 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1166 | * usual method */ |
1167 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1168 | lr = -1; /* Call method for left argument */ |
1169 | } else { |
1170 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1171 | int logic; |
1172 | |
1173 | /* look for substituted methods */ |
1174 | switch (method) { |
1175 | case inc_amg: |
748a9306 |
1176 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1177 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
3280af22 |
1178 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1179 | } |
1180 | break; |
1181 | case dec_amg: |
748a9306 |
1182 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1183 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
3280af22 |
1184 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1185 | } |
1186 | break; |
1187 | case bool__amg: |
1188 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1189 | break; |
1190 | case numer_amg: |
1191 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1192 | break; |
1193 | case string_amg: |
1194 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1195 | break; |
dc437b57 |
1196 | case not_amg: |
1197 | (void)((cv = cvp[off=bool__amg]) |
1198 | || (cv = cvp[off=numer_amg]) |
1199 | || (cv = cvp[off=string_amg])); |
1200 | postpr = 1; |
1201 | break; |
748a9306 |
1202 | case copy_amg: |
1203 | { |
76e3520e |
1204 | /* |
1205 | * SV* ref causes confusion with the interpreter variable of |
1206 | * the same name |
1207 | */ |
1208 | SV* tmpRef=SvRV(left); |
1209 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1210 | /* |
1211 | * Just to be extra cautious. Maybe in some |
1212 | * additional cases sv_setsv is safe, too. |
1213 | */ |
76e3520e |
1214 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1215 | SvOBJECT_on(newref); |
76e3520e |
1216 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1217 | return newref; |
1218 | } |
1219 | } |
1220 | break; |
a0d0e21e |
1221 | case abs_amg: |
748a9306 |
1222 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1223 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1224 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1225 | if (off1==lt_amg) { |
748a9306 |
1226 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1227 | lt_amg,AMGf_noright); |
1228 | logic = SvTRUE(lessp); |
1229 | } else { |
748a9306 |
1230 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1231 | ncmp_amg,AMGf_noright); |
1232 | logic = (SvNV(lessp) < 0); |
1233 | } |
1234 | if (logic) { |
1235 | if (off==subtr_amg) { |
1236 | right = left; |
748a9306 |
1237 | left = nullsv; |
a0d0e21e |
1238 | lr = 1; |
1239 | } |
1240 | } else { |
1241 | return left; |
1242 | } |
1243 | } |
1244 | break; |
1245 | case neg_amg: |
1246 | if (cv = cvp[off=subtr_amg]) { |
1247 | right = left; |
1248 | left = sv_2mortal(newSViv(0)); |
1249 | lr = 1; |
1250 | } |
1251 | break; |
1252 | default: |
1253 | goto not_found; |
1254 | } |
1255 | if (!cv) goto not_found; |
1256 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1257 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1258 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1259 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1260 | : (CV **) NULL)) |
a0d0e21e |
1261 | && (cv = cvp[off=method])) { /* Method for right |
1262 | * argument found */ |
1263 | lr=1; |
748a9306 |
1264 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1265 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1266 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1267 | && !(flags & AMGf_unary)) { |
1268 | /* We look for substitution for |
1269 | * comparison operations and |
fc36a67e |
1270 | * concatenation */ |
a0d0e21e |
1271 | if (method==concat_amg || method==concat_ass_amg |
1272 | || method==repeat_amg || method==repeat_ass_amg) { |
1273 | return NULL; /* Delegate operation to string conversion */ |
1274 | } |
1275 | off = -1; |
1276 | switch (method) { |
1277 | case lt_amg: |
1278 | case le_amg: |
1279 | case gt_amg: |
1280 | case ge_amg: |
1281 | case eq_amg: |
1282 | case ne_amg: |
1283 | postpr = 1; off=ncmp_amg; break; |
1284 | case slt_amg: |
1285 | case sle_amg: |
1286 | case sgt_amg: |
1287 | case sge_amg: |
1288 | case seq_amg: |
1289 | case sne_amg: |
1290 | postpr = 1; off=scmp_amg; break; |
1291 | } |
1292 | if (off != -1) cv = cvp[off]; |
1293 | if (!cv) { |
1294 | goto not_found; |
1295 | } |
1296 | } else { |
a6006777 |
1297 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1298 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1299 | notfound = 1; lr = -1; |
1300 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1301 | notfound = 1; lr = 1; |
1302 | } else { |
46fc3d4c |
1303 | SV *msg; |
774d564b |
1304 | if (off==-1) off=method; |
46fc3d4c |
1305 | msg = sv_2mortal(newSVpvf( |
1306 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1307 | AMG_names[method + assignshift], |
e7ea3e70 |
1308 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1309 | SvAMAGIC(left)? |
1310 | "in overloaded package ": |
1311 | "has no overloaded magic", |
1312 | SvAMAGIC(left)? |
1313 | HvNAME(SvSTASH(SvRV(left))): |
1314 | "", |
1315 | SvAMAGIC(right)? |
e7ea3e70 |
1316 | ",\n\tright argument in overloaded package ": |
1317 | (flags & AMGf_unary |
1318 | ? "" |
1319 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1320 | SvAMAGIC(right)? |
1321 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1322 | "")); |
a0d0e21e |
1323 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1324 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1325 | } else { |
fc36a67e |
1326 | croak("%_", msg); |
a0d0e21e |
1327 | } |
1328 | return NULL; |
1329 | } |
1330 | } |
1331 | } |
1332 | if (!notfound) { |
774d564b |
1333 | DEBUG_o( deb( |
46fc3d4c |
1334 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1335 | AMG_names[off], |
748a9306 |
1336 | method+assignshift==off? "" : |
1337 | " (initially `", |
1338 | method+assignshift==off? "" : |
a6006777 |
1339 | AMG_names[method+assignshift], |
748a9306 |
1340 | method+assignshift==off? "" : "')", |
1341 | flags & AMGf_unary? "" : |
1342 | lr==1 ? " for right argument": " for left argument", |
1343 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1344 | HvNAME(stash), |
1345 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1346 | /* Since we use shallow copy during assignment, we need |
1347 | * to dublicate the contents, probably calling user-supplied |
1348 | * version of copy operator |
1349 | */ |
c07a80fd |
1350 | if ((method + assignshift==off |
748a9306 |
1351 | && (assign || method==inc_amg || method==dec_amg)) |
1352 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1353 | } |
1354 | { |
1355 | dSP; |
1356 | BINOP myop; |
1357 | SV* res; |
54310121 |
1358 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1359 | |
54310121 |
1360 | CATCH_SET(TRUE); |
a0d0e21e |
1361 | Zero(&myop, 1, BINOP); |
1362 | myop.op_last = (OP *) &myop; |
1363 | myop.op_next = Nullop; |
54310121 |
1364 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1365 | |
e788e7d3 |
1366 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1367 | ENTER; |
462e5cf6 |
1368 | SAVEOP(); |
533c011a |
1369 | PL_op = (OP *) &myop; |
3280af22 |
1370 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1371 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1372 | PUTBACK; |
11343788 |
1373 | pp_pushmark(ARGS); |
a0d0e21e |
1374 | |
924508f0 |
1375 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1376 | PUSHs(lr>0? right: left); |
1377 | PUSHs(lr>0? left: right); |
3280af22 |
1378 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1379 | if (notfound) { |
a6006777 |
1380 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1381 | } |
1382 | PUSHs((SV*)cv); |
1383 | PUTBACK; |
1384 | |
533c011a |
1385 | if (PL_op = pp_entersub(ARGS)) |
76e3520e |
1386 | CALLRUNOPS(); |
a0d0e21e |
1387 | LEAVE; |
1388 | SPAGAIN; |
1389 | |
1390 | res=POPs; |
d3acc0f7 |
1391 | POPSTACK; |
54310121 |
1392 | CATCH_SET(oldcatch); |
a0d0e21e |
1393 | |
a0d0e21e |
1394 | if (postpr) { |
1395 | int ans; |
1396 | switch (method) { |
1397 | case le_amg: |
1398 | case sle_amg: |
1399 | ans=SvIV(res)<=0; break; |
1400 | case lt_amg: |
1401 | case slt_amg: |
1402 | ans=SvIV(res)<0; break; |
1403 | case ge_amg: |
1404 | case sge_amg: |
1405 | ans=SvIV(res)>=0; break; |
1406 | case gt_amg: |
1407 | case sgt_amg: |
1408 | ans=SvIV(res)>0; break; |
1409 | case eq_amg: |
1410 | case seq_amg: |
1411 | ans=SvIV(res)==0; break; |
1412 | case ne_amg: |
1413 | case sne_amg: |
1414 | ans=SvIV(res)!=0; break; |
1415 | case inc_amg: |
1416 | case dec_amg: |
bbce6d69 |
1417 | SvSetSV(left,res); return left; |
dc437b57 |
1418 | case not_amg: |
44a8e56a |
1419 | ans=!SvOK(res); break; |
a0d0e21e |
1420 | } |
54310121 |
1421 | return boolSV(ans); |
748a9306 |
1422 | } else if (method==copy_amg) { |
1423 | if (!SvROK(res)) { |
a6006777 |
1424 | croak("Copy method did not return a reference"); |
748a9306 |
1425 | } |
1426 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1427 | } else { |
1428 | return res; |
1429 | } |
1430 | } |
1431 | } |
1432 | #endif /* OVERLOAD */ |
4e35701f |
1433 | |